When I leave my computer off for a long time (eg overnight) and turn it back on it will run for a few minutes then freeze. I have formatted my harddrive and tried 2 different operating systems which makes me think that it's a hardware problem. After I turn off my computer and then start it up right away it will work fine. Does anyone know what the problem could be?

I found out that I am missing my video card driver and my sound card driver. Also that my power supply only goes up to 250w but i've heard 2ghz athlon's require 350-400. I've narrowed it down to these 2 things. Any one have any guess on which one it is?

Hi and welcome. A 250W P/S is a little on the skimpy side for a Athlon @ 2G. Especially more so if u are usin more than 1 (Ide Atapi Drv, Hard Disk) Devices + x number adapter cards ? I'd opt to upgrade that PSU, irregardless.